Dwyer Instruments 1950-20-2F Pressure Switch 320720-756 It is a direct fit

It is a direct fit for Superior 3CFA shells and Alco/Emerson BTAS-3 shells

Equipped with a resilient Buna-N seat

making it compatible with high-pressure refrigerants like R-410A as well as R-134a and R-404A systems

the heater is energized through a set of auxiliary contacts when the compressor is idle and de-energized via the contactor once the system starts

Can I adjust the timing delays on this model

Dwyer Instruments 1950-20-2F Pressure Switch 320720-756 It is a direct fitThe Dwyer Instruments 1950 20 2F Pressure Switch is a trade standard solution for monitoring differential pressure in hazardous locations. Engineered as an explosion proof alternative to the Series 1900, this unit integrates a weatherproof housing that meets NEMA 3, 7, and 9 ratings. With an adjustable range of 4 to 20" w. c. and a tight deadband of 0. 40 to 0. 60, it provides precise control for HVAC systems, fan proof of flow, and filter monitoring.